Use substitution to solve for k. j+2k= -4 3j-4k= 3

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asked Jun 24, 2019 49.3k views

1 Answer

MikeJPR · Answer 1 · 2019-06-30T07:32:34+0000

j+2k=-4
j=-4-2k (1)

3j-4k=3 (2)

Substitue (1) in (2)

3(-4-2k)-4k=3
-12-6k-4k=3
-10k=3+12
k=-15/10 (3)

Substitue (3) in (1)

j=-4-2(-15/10)
j=-1

Final answers j = -1 and k = -15/10

Use substitution to solve for k. j+2k= -4 3j-4k= 3

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